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Int J Syst Evol Microbiol 58 (2008), 479-485; DOI  10.1099/ijs.0.65344-0
© 2008 International Union of Microbiological Societies

Thalassobaculum litoreum gen. nov., sp. nov., a member of the family Rhodospirillaceae isolated from coastal seawater

Gwang I. Zhang, Chung Y. Hwang and Byung C. Cho

School of Earth and Environmental Sciences and Research Institute of Oceanography, Seoul National University, San 56-1, Shillim-dong, Kwanak-gu, Seoul 151-742, Republic of Korea

Correspondence
Byung Cheol Cho
bccho{at}snu.ac.kr

A Gram-negative, facultatively anaerobic strain with slightly curved and straight rod-shaped cells, strain CL-GR58T, was isolated from coastal seawater (near Gori, Korea). Analyses of the 16S rRNA gene sequence revealed that strain CL-GR58T belonged to the family Rhodospirillaceae with Azospirillum lipoferum as its closest relative (gene sequence similarity of 90.9 %). Phylogenetic analyses of the 16S rRNA gene sequences showed that strain CL-GR58T was not associated with any known genera in the family Rhodospirillaceae. The novel strain grew in the presence of 1–10 % sea salts, optimally at 30–35 °C and pH 8. The major cellular fatty acids consisted of C18 : 1{omega}7c (48.5 %), C16 : 0 (14.8 %), C17 : 0 (12.2 %), C19 : 0 cyclo {omega}8c (6.3 %) and summed feature 3 (C16 : 1{omega}7c and/or iso-C15 : 0 2-OH, 6.0 %). Among the phylogenetically related genera, the fatty acid C17 : 0 was found only in strain CL-GR58T. The DNA G+C content of the novel strain was 68.0 mol%. According to phylogenetic analyses of the 16S rRNA gene sequence, fatty acid content and the physiological data, strain CL-GR58T represents a novel species in a new genus of the family Rhodospirillaceae, for which the name Thalassobaculum litoreum gen. nov., sp. nov. is proposed. The type strain of the type species is CL-GR58T (=KCCM 42674T=DSM 18839T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain CL-GR58T is EF203900.






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